Project Management (Drawing a network diagram)

Can someone please just try to show me how to create a network diagram (including dummy activities), using activity on arc.
I find it confusing, opposed to using activity at node, but I've been asked to do it with activities on arcs with follow up questions which I can do; eg critical path and earliest event times. I just can't seem to create a neat/tidy and accurate network diagram.

Thanks

Activity A has no preceding activities
Activities B, C and D all have only activity A as a preceding activity
Activity E only has activity B as a preceding activity
Activity F only has activity C as a preceding activity
Both activities G and H have activities C and D as their preceding activities (where it got tricky for me, tricky to draw, dummy activities etc)
Activity I has activities G and E as preceding activities
Activity J has activities I, H and F as preceding activities